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How to upgrade OpenSSH 7.0 to 7.2 on a OpenBSD Unix and Linux

OpenSSH version 7.2 has been released. How do I install or upgrade my existing OpenSSH version to 7.2 on a OpenBSD unix operating system?
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Sysadmin because even developers need heroes!!!

HowTo: Compile And Run a C/C++ Code In Linux

I am a new Linux user and student who used to write C or C++ programs on MS-Windows. Now, I am using Ubuntu Linux. How can I compile a C or C++ program on Linux operating systems using bash Terminal application?
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Mac OS X: Install wget Network Downloader Utility

I recently learned that “wget” can continue getting a partially-downloaded (resume download) file. I am unable to find wget command on Mac OS X. How do I install install wget on Mac OS X (Mountain Lion/ Mavericks / Snow Leopard)? How can I install wget in Mac OS X without 3rd-party repo such as Homebrew or MacPorts?
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Mac OS X: Install GCC Compiler with Xcode

I have Mac OS X Mountain Lion. I need to compile a few apps and Perl modules. I already installed Xcode from app store but I’m unable to find gcc compiler or make command. How do I install gcc on Mac OS X 10.8.x?
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Nginx: SPDY SSL Installation and Configuration On a Debian / Ubuntu Linux

Google Chrome/Chromium, Firefox and Opera browser support SPDY networking protocol. It enables faster browsing on supported sites. SPDY is similar to HTTP, with particular goals to reduce web page load latency and improve web security. SPDY achieves reduced latency through compression, multiplexing, and prioritization. How do I enable nginx SPDY support running on Debian or Ubuntu Linux server?
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FreeBSD: The search target requires INDEX-9. Please run make index or make fetchindex

I am using make search name=foo command but getting the following error:

The search target requires INDEX-9. Please run make index or make fetchindex

How do I search ports tree under FreeBSD operating system and fix this issue?
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I‘ve compiled and install an application called gpass on CentOS v5.6. But, when I run the application it does not accept any password from $HOME/.gpass and displays the following error on screen:

libglade-WARNING **: could not find signal handler ‘gpass_authentication_on_response’

How do I fix this problem and use the gpass software?
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FreeBSD Set Network Polling To Boost Performance

I‘ve Intel PRO/1000 Gigabit Ethernet adapter installed in my server. How do I set network card (NIC) polling and disable interrupts under FreeBSD operating systems to boost network performance for 100M and 1000M network links?
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Upgrade FreeBSD 7.x to 7.2 Stable Release

I tried a binary upgrade method, but it failed due to custom kernel installed on my FreeBSD 7.1_p5 64 bit AMD systems. How do I upgrade my FreeBSD server using source code method?
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FreeBSD: Install bindgraph To Make Graphs About Queries Sent To BIND

How do I install bindgraph to make pretty query statistics about my BIND server running FreeBSD Unix operating system?
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